According to Eric Schmidt, this is first time Google, Apple, Facebook and Amazon all have exploding new platforms that are not only generating profits for themselves but also thousands of third party developers.

This week, I spent a couple of great days at Walt Mossberg and Kara Swisher's annual D: All Things Digital conference. Among the highlights: watching Jill Sobule sing about Rupert Murdoch -- in front of Rupert Murdoch, and Facebook's Sheryl Sandberg levitate around the conference after securing a $200 million investment from the Russians. The breakout star was new Yahoo! CEO Carol Bartz -- and not just because of her perfectly timed F-bomb on the D7 stage. She was a quote machine: "Down 15 percent is the new flat" and "You can't take nine women and make a baby in one month; there is a process" were among my favorites. But the line of the week came from Martha Stewart who told me over lunch: "While Bernie Madoff was on his rampage, the SEC was busy pursuing me." For more on the conference, click here.